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Carmex Thread Turning Internal Insert - NPT - Right Hand - 16IR8NPTK20

Carmex Thread Turning Internal Insert - NPT - Right Hand - 16IR8NPTK20

SKU:16IR8NPTK20

Carmex Thread Turning Internal Insert - NPT - Right Hand - 16IR8NPTK20 is a precision internal threading solution built for versatility on the shop floor. Its laydown triangular geometry delivers... Read more ↓
N
S
Thread TypeInternal
Thread DirectionRight Hand
Thread FormNPT
Pitch8
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£7.74
Prices shown ex. VAT
5 days estimated lead time — subject to availability
Free delivery over £50 ex VAT
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14-day returns
30+ years expertise
Klarna
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01732 887334
Mon – Thurs 8:30 – 17:30 · Fri 8:30 – 16:30

Description

Carmex Thread Turning Internal Insert - NPT - Right Hand - 16IR8NPTK20 is a precision internal threading solution built for versatility on the shop floor. Its laydown triangular geometry delivers stable cutting action and reliable chip control, making it suitable for both routine and demanding threading tasks. Designed to address a wide range of thread standards used today, including NPT, this insert helps standardize tooling and reduce setup time across jobs.

  • Broad thread-standards coverage: Designed to handle the majority of common thread standards in today’s applications, including NPT right-hand threads, so you can tackle diverse projects with a single insert and minimize tool changes.
  • Laydown triangular geometry for stability: The triangular laydown design promotes steady cutting forces, improved chip control, and consistent thread form even on longer runs or tougher materials.
  • Easy setup and secure seating: Engineered for quick indexing and reliable seating in standard thread-turning holders, reducing setup time and helping maintain stable performance throughout production.

Using this insert, you can achieve precise, repeatable internal threads with fewer reworks, faster cycle times, and smoother workflow across a range of components—from basic fittings to more demanding housings. It supports reliable performance in everyday machining while providing the confidence of consistent results on the most challenging internal threading tasks.

Part Numbers

Protool Part Number
16IR8NPTK20
Brand
Carmex
Category
Thread Turning
Delivery

Free UK mainland delivery on orders over £50 ex VAT. In-stock items ordered before 4:30pm are dispatched the same working day. Full delivery information.

Returns

14-day returns on unused stock items in original packaging. Special-order and bespoke tooling is non-returnable. Read our returns policy.

Technical Support

Over 30 years of machining experience behind the counter. Call 01732 887334, Mon–Thurs 8:30–17:30, Fri 8:30–16:30.

Trade Accounts

Credit accounts, contract pricing and scheduled call-off orders available for trade customers. Apply for an account.

What time are Protool open?

We are open Monday to Friday between 8:30am and 5pm.

Do you offer Free Next Day delivery?

Yes! We offer Free Next Day delivery via Royal Mail Tracked 24 on all orders over £50 ex VAT*. We also offer Free DPD Local Next Day delivery on all orders over £100 ex VAT*.

We also offer the following:

  • Royal Mail Tracked 24 — £5.90 (FREE on orders over £50 ex VAT*). Order before 4:30pm for next day delivery. No signature required.
  • DPD Local Next Day — £8.00 (FREE on orders over £100 ex VAT*). Standard next day delivery to UK mainland addresses.
  • Royal Mail Special Delivery — £12.50. Guaranteed delivery before 1pm the next working day.
  • DPD Saturday Delivery — £25.00. Must be ordered on Friday before 4pm. Pre-12pm delivery.

For delivery to Scottish Highlands & Islands, Northern Ireland, Republic of Ireland, or overseas locations, additional charges apply. Please see our delivery page for full details, or call us on 01732 887 334.

*T's & C's and exclusions apply. Please see our delivery page for more information on all our services.

Ask our technical team about this tool

Not sure if this is the right tool for your job? Ask us about speeds and feeds, material suitability, holders or alternatives — 30+ years of machining experience on the other end.

Prefer to talk? Call 01732 887334 — Mon–Thurs 8:30–17:30, Fri 8:30–16:30.

Complete Your Project

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